Oral Epidemiology is a branch of epidemiology, which uses the principles of epidemiology Analytical Instruments, basic principles and methods of oral disease in the study population, development and distribution regularity and influence factors, and oral health research and its influencing factors , to explore the etiology of oral diseases and epidemiological factors, the development of oral health care plan, select control strategies and evaluation of service effectiveness and lay a good foundation. Oral epidemiology is mainly used for:

1 describes the population distribution of oral health and disease status of oral epidemiological population oral health status can be described, cross-sectional descriptive survey was the most commonly used methods of oral epidemiology. It can be a region, a group of people in a certain period of Dental Instruments time of the investigation or certain oral diseases, access to medical education network collected in the area of ​​a specific group of people or certain oral diseases, the prevalence and distribution. In these diseases, such as age, sex, occupation, race, culture, economy, customs and other aspects of the distribution. For other regions Environmental monitoring or different population groups during the comparison and evaluation.

2 study the causes and impact of oral diseases prevalent factors available through a cross-sectional survey the prevalence of certain diseases or factors that leads to form a risk factor hypothesis, and then use the methods of analytical epidemiology for evidence of the risk factors, to determine the possible cause of the disease. If you need to use other research methods, such as a variety of laboratory experiments and epidemiological methods, sometimes also combined with clinical studies, combination of these results may help to further reveal the factors that cause the disease.

3 of disease prevention measures and to evaluate the effect of oral epidemiology can also be used to prevent oral disease prevention measures and methods of research, and evaluation of their effectiveness. A new method of prevention or precaution, to obtain a large number of epidemiological studies of non-experimental evidence, epidemiological experimental methods available to test its effectiveness, the crowd is usually the subjects were randomly assigned to intervention or Cause of dental caries in children occur control group, and in the course of the experiment using blind or double blind method. After a certain amount of experimental period, compared two groups of onset differences.

4 for oral diseases can also be used to monitor oral epidemiological monitoring of oral disease trends. The prevalence of oral diseases often influenced by many factors, such as behavior and lifestyle, environment, health care status, changes in these factors often lead to changes in the prevalence of oral diseases, which require regular monitoring.

5. To develop oral health care programs and evaluate their progress epidemiological surveys of oral health administrative departments at all levels to develop oral health objectives, planning the main basis for oral health measures.